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8
Appendix A Optical Measurement
This part of the Optical Test Instruction describes those measurements to be executed
during the production of the optical engines.
Content:
A1 BRIGHTNESS
A2 BRIGHTNESS UNIFORMITY
A3 BRIGHTNESS DIFFERENCE
A4 ANSI CONTRAST
A5 PEAK CONTRAST
A6 LIGHT LEAKAGE
A7 IMAGE DISTORTION
A8 THROW RATIO
A9 ZOOM RATIO
A10 FOCUS RANGE
A11 COLOR
A12 COLOR UNIFORMITY
A13 OPTICAL KEYSTONE (FIXED)
General requirements
1. The unit shall be allowed to stabilize without further adjustment for a
minimum of 10 minutes, at nominal ambient room temperature of 25°C,
before making measurements.
2. Measurements shall take place in a light proof room, where the only source of
illumination is the projector. Less than 1% of the light on the screen shall be
from any source other than the projector.
3. All measurements shall be made on flat screens that do not provide any
advantage to the performance of the unit
4. All measurements shall be made at standard color temperature setting, 100%
white image (per ANSI IT7.228-1997), except where noted